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<p><br>
			    Data is filtered on a series-by-series basis. When a series is filtered, its 
				data points are either removed from the series&nbsp;or marked as empty. The 
				points that are filtered depends on the specified filtering criteria.</p>
		<p>Filtering criteria can be specified in several different ways:
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			<LI>
			Using date/time ranges.
			<LI>
			Removing all points except for the largest or smallest points.
			<LI>
			    Comparing point values against a constant.
			<LI>
				Using custom criteria.</LI></UL>
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